December weather forecast
Trois Rois, French Guiana

The first month of the winter, December, is also a moderately hot month in Trois Rois, French Guiana, with an average temperature fluctuating between 28.8°C (83.8°F) and 24.5°C (76.1°F).

Temperature

December's arrival brings an average high-temperature of a warm 28.8°C (83.8°F), slightly deviating from November's 30.8°C (87.4°F). Trois Rois's nighttime temperatures in December display a slight drop from daytime highs, averaging to a still moderately hot 24.5°C (76.1°F).

Heat index

In December, the average heat index is evaluated at a very hot 35°C (95°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in December is 83%.

Rainfall

In Trois Rois, French Guiana, during December, the rain falls for 25.2 days and regularly aggregates up to 204mm (8.03") of precipitation. In Trois Rois, during the entire year, the rain falls for 277 days and collects up to 1707mm (67.2") of precipitation.

Daylight

The month with the shortest days in Trois Rois is December, with an average of 11h and 48min of daylight.
On the first day of December in Trois Rois, sunrise is at 06:23 and sunset at 18:15. On the last day of the month, sunrise is at 06:38 and sunset at 18:28 -03.

Sunshine

The average sunshine in December is 7.3h.

UV index

January through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: An average maximum UV index of 6 in December leads to these recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.